pinctrl: Fix warning by adding missing MODULE_LICENSE

Fix below build warning

   WARNING: modpost: missing MODULE_LICENSE() in
   drivers/pinctrl/pinctrl-equilibrium.o

Introduced by commit

   1948d5c ("pinctrl: Add pinmux & GPIO controller driver for a new SoC")

by adding missing MODULE_LICENSE.

Signed-off-by: Rahul Tanwar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Linus Walleij <[email protected]>

Author: Rahul Tanwar

drivers/pinctrl/pinctrl-equilibrium.c

@@ -942,3 +942,4 @@ module_platform_driver(eqbr_pinctrl_driver);
 
 MODULE_AUTHOR("Zhu Yixin <[email protected]>, Rahul Tanwar <[email protected]>");
 MODULE_DESCRIPTION("Pinctrl Driver for LGM SoC (Equilibrium)");
+MODULE_LICENSE("GPL v2");